[Patch] MdeModulePkg: Remove the trailing space in three source files.

[Liming Gao <liming.gao@intel.com>]

The recent changes in these three source files introduce the trailing space.
This patch removes them to follow edk2 coding style.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
---
 MdeModulePkg/Bus/Usb/UsbBusPei/UsbPeim.c                             | 2 +-
 MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.h                | 2 +-
 MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.inf | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/MdeModulePkg/Bus/Usb/UsbBusPei/UsbPeim.c b/MdeModulePkg/Bus/Usb/UsbBusPei/UsbPeim.c
index c31247a..513575d 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusPei/UsbPeim.c
+++ b/MdeModulePkg/Bus/Usb/UsbBusPei/UsbPeim.c
@@ -958,7 +958,7 @@ GetExpectedDescriptor (
   UINTN           Offset;
 
   //
-  // Total length is too small that cannot hold the single descriptor header plus data. 
+  // Total length is too small that cannot hold the single descriptor header plus data.
   //
   if (Length <= sizeof (USB_DESC_HEAD)) {
     DEBUG ((DEBUG_ERROR, "GetExpectedDescriptor: met mal-format descriptor, total length = %d!\n", Length));
diff --git a/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.h b/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.h
index be2f8af..ad3afa6 100644
--- a/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.h
+++ b/MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Impl.h
@@ -129,7 +129,7 @@ struct _MTFTP4_PROTOCOL {
   // Record the total received and saved block number.
   //
   UINT64                        TotalBlock;
-  
+
   //
   // Record the acked block number.
   //
diff --git a/MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.inf b/MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.inf
index 7ccab57..30c955f 100644
--- a/MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.inf
+++ b/MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.inf
@@ -112,7 +112,7 @@
 
   # Oniguruma: tag_end in parse_callout_of_name
   GCC:*_*_*_CC_FLAGS = -Wno-error=maybe-uninitialized
-  
+
   # Not add -Wno-error=maybe-uninitialized option for XCODE
   # XCODE doesn't know this option
   XCODE:*_*_*_CC_FLAGS =
-- 
2.10.0.windows.1